ISL28617FVZ-T7

Overview

The ISL28617FVZ-T7 is a high-performance, differential input, differential output instrumentation amplifier designed for precision analog-to-digital applications. It operates over a supply range of 8V to 40V with a differential input voltage range up to ±34V. The device features rail-to-rail output drive optimized for ADC drivers and allows gain programming from 0.1 to 10,000 via external resistors RIN and RFB. Kelvin sensing on gain resistors removes trace resistance errors. Input and output stages have individual power supplies (VCC/VEE and VCO/VEO) enabling level shifting. Key electrical parameters include a typical input offset voltage of 30µV, CMRR of 120dB, and bandwidth ranging from 0.3MHz at AV=1k to 5MHz at AV=0.1.

Feature Summary

• Rail-to-rail differential output stage optimized for driving ADCs without overdrive
• Separate power supply pins for input/feedback and output stages to enable level shifting
• Kelvin sense connections on gain resistors to eliminate PCB trace resistance errors
• High DC precision with low input offset voltage and excellent common-mode rejection

Applications

• Precision test and measurement equipment
• High voltage industrial process control systems
• Signal conditioning for remote powered sensors
• Weigh scales
• ECG and biomedical sense amplifiers

Procurement Notes

Verify the datasheet revision FN6562 Rev 3.00 matches your design requirements. Confirm the -T7 suffix indicates tape and reel packaging in accordance with TB347 specifications. Ensure the 24 Ld TSSOP package dimensions align with your board layout constraints. Check moisture sensitivity levels and reflow profile compliance before assembly.

Selection Notes

Select this component when driving differential ADCs requires rail-to-rail output swing and precise level shifting capabilities. The separate supply domains allow the output stage to operate at lower voltages than the high-voltage input stage. Ensure external resistors meet tolerance requirements as gain accuracy depends on their matching. Verify that the feedback resistor value keeps the output within the linear dynamic range defined by the internal current sources.

Part Context

The ISL28617 is part of the Intersil/Renesas precision amplifier family, specifically engineered for instrumentation applications requiring high voltage interfaces. It utilizes a unique architecture with separate input and output power domains to facilitate signal translation between high common-mode inputs and low-voltage digital converters. The device is housed in a compact 24-lead TSSOP package suitable for space-constrained designs.

Replacement Considerations

The datasheet explicitly states: NOT RECOMMENDED FOR NEW DESIGNS and NO RECOMMENDED REPLACEMENT. Contact the Technical Support Center for assistance.